JPS589570Y2 - drum type washing machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the improvement of a drum-type washing machine.The purpose of the invention is to have a drive shaft that rotates a rotating drum, and a drive motor installed on the same axis as the drive shaft that rotates the drum in reverse. a rotating member provided on the drive shaft so as to rotate together with the rotating member; a brake drum provided at an appropriate stationary portion; and a brake drum rotatably provided on the rotating member and having a friction member at one end. a brake lever which has an engaging member at the other end thereof and is normally rotated and biased to an operating position where the friction member is in pressure contact with the brake drum; first and second brake levers, which are provided on the rotor and rotate in one direction and the opposite direction with the rotating body, respectively, to press the retaining member and rotate the brake lever to a non-operating position in which the friction member is separated from the brake drum; Second
a guide hole portion having first and second retaining portions located at the ends of the first and second slope portions and engaging with the engaging member; The inclination angle of the first inclined part that presses the engaging member when the hole rotates in the same direction as the rotation direction of the engaging member of the brake lever to the inactive position is determined by the inclination angle of the second inclined part. By configuring the configuration to be larger than that,
It is extremely safe because the brake can be immediately applied to the rotating drum when the drive motor is out of power, and the brake release torque can be balanced when the rotating body rotates in either one direction or the opposite direction. To provide a drum type washing machine capable of preventing load fluctuations of a drive motor.

An embodiment of the present invention will be described below with reference to the drawings.

First, in Fig. 1, 1 is an outer box having an opening 2 for putting in and taking out laundry on the front, 3 is a door pivoted to the opening 2 of the outer box 1 to open and close it, and 4 is an outer box. A water tank is suspended in the box 1 via an elastic suspension mechanism 5, and 6 is a connecting body that connects the opening 4a and the opening 2 in a watertight manner on the front surface of the water tank 4.
Reference numeral 7 designates a rotating drum that is disposed within the water receiving tank 4 and has a large number of small holes 7a in its peripheral wall, and 8 is a stirring blade that is disposed approximately at the rear center of the rotary drum 7.

Reference numeral 9 denotes a drive mechanism section disposed at the rear lower part of the water receiving tank 4, and this includes a drive motor 1 whose speed can be switched in two stages, high and low.
0, and also has a drum drive pulley 11 and a tool drive pulley 12.

In this drive mechanism section 9, the drive motor 10 is
During washing, it is rotated forward and backward at a low speed at a predetermined period, and this is transmitted at a reduced speed to the drum drive pulley 11 and directly to the tool drive pulley 12, and during dewatering, it is rotated at a high speed in one direction to transmit this. The signal is directly transmitted to the drum drive pulley 11 and the tool drive pulley 12.

On the other hand, 13 is a driven mechanism section, which will be described below in the second section.
The description will be made according to the diagram and FIG. 3.

Reference numeral 14 denotes a housing that also serves as a brake drum and is attached by bolts or the like to the rear center of the water tank 4, which is a suitable stationary part, and has a housing with a large diameter that protrudes into and out of the water tank 4, respectively. Shaft cylinder part 15. A small diameter cylindrical portion 16 is formed.

17 is a hollow drive shaft formed by fitting and connecting a large diameter shaft 18 with a small diameter shaft 19; the large diameter shaft 18 is inserted into the large diameter shaft cylindrical portion 18 via a ball bearing 20 and a seal member 21; The small diameter shaft 19 is supported through the small diameter shaft cylindrical portion 16 via a ball bearing 22.

Further, 23 is a blade shaft, which includes a drive shaft 17, bearing metals 24, 24, three oil-impregnated felts 25, and a seal member 2.
It is inserted and supported through 6.

Further, at the front end of the drive shaft 17, a patch plate 27 is attached to the rear plate of the rotary drum 7 approximately in the center with bolts or the like.
The center portion of the blade shaft 23 is connected and fixed through a nut 28, and the stirring blade 8 is connected to the front end portion of the blade shaft 23 through a screw 8a.

Further, a boss portion 30 of a drum driven pulley 30 as a rotating body is connected to the rear end portion of the drive shaft 17 via a bearing metal 29.
a is rotatably supported around its axis, and a boss portion 31a of a tool driven pulley 31 is fitted and fixed to the rear end portion of the wing shaft 23.

A drum belt 32 is stretched between the drum driven pulley 30 and the drum drive pulley 11, and a tool belt 33 is stretched between the tool driven pulley 31 and the tool drive pulley 12. It is stretched.

Reference numeral 34 denotes a transmission control mechanism, and its transmission member 35.35 is connected to appropriate two of the plurality of arm portions 30b of the drum driven pulley 30, and is a part of the drum driven pulley 30. In addition, these transmission members 35
．． A guide hole portion 36.36 is formed in 35.

The edge portion of this guide hole portion 36 located on the small diameter shaft 19 side is located between the first engaging portion 36a and the second engaging portion 36b at both ends, and a boundary portion 36C approximately at the center. A first inclined part 36 d and a second inclined part 36 e are formed in order toward the outside.

Reference numeral 37 denotes a rotating member that is fitted and fixed to the rear end side of the small diameter shaft 19 of the drive shaft 17, and arm portions 37 a and 37 a that project in mutually opposite directions are formed on this rotating member.

Also, the arm portions 37a, 3 of this rotating member 37.37
7. At the tip of a there is a stepped stud 38.38 and a collar 39.
．． Approximately middle portions of the brake levers 40 and 40 are rotatably supported in the directions of the arrow A and counter-arrow A via the brake levers 40 and 39,
The brake lever 40.40 has a friction member 41 at one end thereof corresponding to the inner peripheral surface of the housing 14.
．． 41 are attached by adhesive or the like, and rollers 42 and 42, which are retaining members, are attached to the other end by means of pins 43 and 43, respectively, so as to fit into the guide holes 36 and 36. It is being

A torsion coil spring 44 is attached to the collar 39.39.
．． 44 is fitted, and one end thereof is connected to the arm portion 37.
a, 37H, and the other end is locked to a brake lever 40.40, respectively, so that the brake lever 40.40 is always rotated in the direction of arrow A by a torsion coil spring 44.44. The friction members 41, 41 are pressed into contact with the inner circumferential surface of the housing 14 in the operating position.

Although not shown, the outer box 1 is provided with a water supply solenoid valve for supplying water into the water tank 4 and a drainage solenoid valve for draining water from the water tank 4. A timer is installed to control operation.

Next, the operation of this embodiment having the above configuration will be explained.

After loading the laundry into the rotating drum 7 through the opening 2, the door 3
When the holder is closed and a timer (not shown) is set, the washing process begins.

During this washing process, first, a solenoid valve for water supply (not shown) is energized and opened to supply water into the water tank 4. When the water level in the water tank 4 reaches a specified level due to this water supply, the drive motor 10 is energized. The drum is rotated forward and backward alternately at low speed and at predetermined time intervals, and this deceleration is transmitted to the drum drive pulley 11 and further transmitted to the drum driven pulley 30 via the drum belt 32. Thus, the drum driven pulley 30 is reversely rotated in one direction of arrow B and in the opposite direction of arrow C (counter-arrow B direction) at predetermined time intervals.

On the other hand, on the driven mechanism section 13 side, the transmission control mechanism 34
The brake lever 40 is always rotated in the direction of arrow A by the spring force of the torsion coil spring 44 to press its friction member 41 against the inner circumferential surface of the housing 14, but as described above, the drum driven pulley 30 When the drum belt 32 is reversely rotated in the directions of arrows B and C, the transmission member 35 is also rotated in the same direction, and one of the inclined portions 36 d and 35 e of the guide hole portion 36 is connected to the roller 42 . As a result, the brake lever 40 is rotated in the direction of the arrow (opposite the direction of the arrow A) against the spring force of the torsion coil spring 44, and the friction member 41 is moved away from the inner peripheral surface of the housing 14. Separate.

Then, when the drum driven pulley 30 is further rotated in the direction of arrow B or arrow C, the engaging portion 36 of the guide hole portion 36
One of the rollers 42 . Brake lever 40. The water is transmitted to the rotating drum 7 via the rotating member 37 and the drive shaft 17, and the rotating drum 7 is rotated in reverse at a low speed to perform washing.

Incidentally, the rotation of the drive motor 10 is controlled by the tool drive boot. Wing belt 33. The water is transmitted to the agitating blade 8 via the implement driven pulley 31 and the blade shaft 23, and the agitating blade 8 is also rotated in reverse to facilitate washing.

By the way, now the drum driven pulley 30 is rotated in the direction of arrow B or arrow C, and the guide hole 3 in the transmission member 35 is rotated.
6 first engaging portion 36 a or second engaging portion 36 b
Considering the process until the first retaining portion 36a or the second engaging portion 36b engages with the roller 42, the rotating drum 7 is The drum driven pulley 30 is not rotated and rotates idly, so that the drive motor 10 is rotated in a substantially no-load state.

When the drum driven pulley 30 is stopped without being rotated, the brake lever 40 is rotated by the torsion coil spring 4.
The roller 42 at the other end is rotated in the direction of the arrow A by the spring force of 4, and the friction member 41 at one end is pressed against the inner circumferential surface of the housing 14.
6, and its axis is located on the base line 11 connecting the axis of the drive shaft 17 and the boundary portion 36C.

In this embodiment, as shown in FIG. 4, the second retaining portion 36b and the first engaging portion 36 are
Let the distance to a be a and b, and the first retaining part 36
Let C be the distance from the axis of the roller 42 to the base line 11 at the position shown by the two-dot chain line in FIG. In the case of
and the inclination angle θ of the second inclined portion 36e.
2 is set so that θ1>θ2.

To explain this in more detail, the drum driven pulley 3
0 Therefore, when the guide hole portion 36 of the transmission member 35 rotates in the direction of arrow B, the direction of arrow B, which is the direction of movement of this guide hole portion 36, and the direction of arrow B, which is the direction of movement of roller 42, are on the same side. Therefore, the amount of movement X of the guide hole portion 36 until the first engaging portion 36a engages with the roller 42 is x=(b+
cr) (where r is the radius of the roller 42), and the drum driven pulley 30 and therefore the guide hole 36 of the transmission member 35.
When rotating in the direction of arrow C, the direction of arrow C, which is the moving direction of the guide hole portion 36, and the direction of arrow C, which is the moving direction of the roller 42, are on the opposite side, so that the second engaging portion 36
The amount of movement y of the guide hole portion 36 until b engages with the roller 42 is y=(a-c-r), and this amount of movement X and y
If they are not equal, the time required for the rotation to be transmitted to the rotating drum 7 will be different between when the drum driven pulley 30 rotates in the direction of arrow B and when it rotates in the direction of arrow C, and the torque balance of the drive motor 10 will change. A problem arises in which it becomes impossible to take

In order to prevent such a problem from occurring, it is sufficient to make the movement amounts
)=(a-C-r), and the result is a=(b+
2C), therefore, in this example, a
=-(b+2C).

After that, the timer moves to the next draining stroke, and first the drive motor 10 is cut off and the rotational force is no longer transmitted to the drum driven pulley 30. Therefore, the brake lever 40 is rotated in the direction of arrow A by the spring force of the spring 44. The rotating drum 7 is rapidly rotated to bring the friction member 41 into pressure contact with the inner circumferential surface of the housing 14, and the rotating drum 7 is stopped by applying a brake.

Further, in this draining process, a draining electromagnetic valve (not shown) is energized and opened, and water is drained from the water receiving tank 4.

In this way, when the drainage process is carried out for a predetermined time,
The timer moves to the next dehydration process.

In this dewatering process, the drive motor 10 is rotated at high speed in one direction, and the drum drive pulley 11
is rotated in one direction at high speed.

The rotation of the drum driving pulley 11 is transmitted to the drum driven pulley 30 via the drum belt 32, so that the rotating drum 7 is rotated in the same manner as described above.

However, in this case, the rotating drum 7 is rotated in one direction at a high speed, thereby dewatering.

Further, after the dewatering process has been carried out for a predetermined period of time, and slightly before the end of the dehydrating process, the drive motor 10 is cut off and the rotational force is no longer transmitted to the drum driven pulley 30, causing the rotational drum 7 to The brake is immediately applied in the same manner as described above.

After that, the timer performs a rinsing process similar to the washing process, a drain process similar to the above, and a dehydration process.

A rinsing process, a draining process, and a dewatering process are performed in sequence, and the washing operation ends.

As described above, according to this embodiment, the brake lever 40 is pivotally mounted on the rotating member 37 that rotates together with the drive shaft 17 that rotationally drives the rotating drum 7, and the brake lever 40 is always connected to the spring of the torsion coil spring 44. The force applies rotational force in the direction of arrow A so that the friction member 41 at one end comes into pressure contact with the inner circumferential surface of the housing 14, and further transfers the transmission member 3 to the drum driven pulley 30 rotated by the drive motor 10.
5 is attached to the transmission member 35, and a guide hole 36 is formed in the transmission member 35 to fit with the roller 42 at the other end of the brake lever 40. The inclined parts 36 d and 36 e are provided, and the distance relationship between them is set to a (b + 2 c), so that the inclination angle θ1 of the first inclined part 36 d is the same as that of the second inclined part 36
The inclination angle of e is larger than θ2 (θ1>θ2).

Therefore, when the washing and dewatering process by the timer is completed and the drive motor 10 is cut off, and the rotational force is no longer transmitted to the drum driven pulley 30, the brake lever 4
0 immediately turns arrow A due to the spring force of the torsion coil spring 44.
The friction member 41 is brought into pressure contact with the inner circumferential surface of the housing 14 by being rotated in the direction, thereby applying a brake to the rotating drum 7, which is extremely safe.

Moreover, as described above, the dimensional relationship of the guide hole portion 36 is
=:(b+2C) so that the inclination angle θ1 of the first inclination portion 36d is larger than the inclination angle θ2 of the second inclination portion 36e, so that the drum driven pulley 30 moves in the direction of arrow B and The rotating drum 7 rotates in either direction of arrow C.
The time it takes for the rotational force to be transmitted to the drive motor 1 (the time during which the drum driven pulley 30 rotates idly) is constant, and therefore the brake release torque can be balanced.
0 load fluctuation can be prevented.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, but can of course be implemented with appropriate modifications within the scope of the invention.

As is clear from the embodiments described above, the present invention is extremely safe because it can immediately apply a brake to the rotating drum when the drive motor is cut off, and it also prevents rotation of the rotating body in either one direction or the opposite direction. To provide a drum-type washing machine that can balance the brake release torque and prevent load fluctuations of the drive motor even when the brake is released.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, FIG. 1 is a longitudinal sectional view, FIG. 2 is an enlarged longitudinal sectional view of the driven mechanism, and FIG. 3 is FIG. 2 II.
A sectional view taken along the line I-III, Figure 4 is a third diagram for explaining the operation.
It is a figure equivalent figure. In the drawing, 4 is a water tank, 7 is a rotating drum, 9 is a drive mechanism, 10 is a drive motor, 11 is a drum drive pulley, 13
14 is a driven mechanism part, 14 is a housing (brake drum),
17 is a drive shaft, 30 is a drum driven pulley (rotating body),
32 is a drum belt, 34 is a transmission control mechanism, 35 is a transmission member, 36 is a guide hole portion, 36 a and 36 b are first
and a second engaging portion, 36 d and 36 e are first and second inclined portions, 37 is a rotating member, 37 a is an arm portion, 4
0 is a brake lever, 41 is a friction member, 42 is a roller (
(retaining member), the figure is a torsion coil spring, and θ1 and θ2 are inclination angles.

Claims (1)

[Scope of utility model registration request] A drive shaft that rotationally drives the rotating drum, a rotating body that is provided on the same axis as the drive shaft and is rotated in reverse by a drive motor, a rotating member that is provided on the drive shaft so as to rotate together with the rotating body, as appropriate. A brake drum provided at a stationary portion of the rotary member, and a friction member rotatably provided on the rotating member and having a friction member at one end and an engagement member at the other end, the friction member normally being pressed against the brake drum. A brake lever is rotatably biased to a position, and the brake lever is provided on the rotating body so as to fit with the engaging member, and when rotated together with the rotating body in one direction and the opposite direction, presses the retaining member, respectively. first and second ramps for rotating the brake lever to an inactive position in which its friction member is spaced from the brake drum; a guide hole portion having first and second retaining portions that engage with the member, the guide hole portion being in the same direction as the rotation direction of the retaining member of the brake lever to the inactive position. A drum-type washing machine characterized in that the inclination angle of the first inclined part that presses the engagement member when rotated is set to be larger than that of the second inclined part.